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1.
LI QiuYue & REN YanXia College of Science China Agricultural University Beijing China LMAM School of Mathematical Sciences Center for Statistical Science Peking University Beijing 《中国科学 数学(英文版)》2011,(7)
In this paper we establish a large deviation principle for the occupation times of critical branching α-stable processes for large dimensions d > 2α, by investigating two related nonlinear differential equations. Our result is an extension of Cox and Griffeath’s (in 1985) for branching Brownian motion for d > 4. 相似文献
2.
In this article, we prove a heat kernel version of Hardy’s theorem for the Laguerre hypergroup. 相似文献
3.
WANG BaoShan & ZHANG ZhiKai LMIB School of Mathematics System Sciences Beihang University Beijing China LMAM School of Mathematical Sciences Peking University Beijing 《中国科学 数学(英文版)》2011,(2)
As a continuation of previous work, in this paper, we mainly study the finite simple groups which have abelian Sylow subgroups in term of p-local rank, especially a group theoretic characterization will be given. 相似文献
4.
Hua-zhongTang 《计算数学(英文版)》2004,22(4):622-632
This paper attempts to develop kinetic flux vector splitting(KFVS)for the Euler equa-tions with general pressure laws.It is well known that the gas distribution function forthe local equilibrium state plays an important role in the construction of the gas-kineticschemes.To recover the Euler equations with a general equation of state(EOS),a newlocal equilibrium distribution is introduced with two parameters of temperature approx-imation decided uniquely by macroscopic variables.Utilizing the well-known connectionthat the Euler equations of motion are the moments of the Boltzmann equation wheneverthe velocity distribution function is a local equilibrium state,a class of high resolutionMUSCL-type KFVS schemes are presented to approximate the Euler equations of gas dy-namics with a general EOS.The schemes are finally applied to several test problems for ageneral EOS.In comparison with the exact solutions,our schemes give correct location andmore accurate resolution of discontinuities.The extension of our idea to multidimensionalcase is natural. 相似文献
5.
HUANG Yan & WU ShengJian LMAM School of Mathematical Sciences Peking University Beijing China 《中国科学 数学(英文版)》2011,(7)
Let X = C\{0,1} and X = X\{}. We get a necessary and suficient condition on the position of in X such that X has stable Teichmller mappings. Furthermore, we can formulate all these stable Teichmller mappings. The main result in this paper partially answers a question posed by Kra. 相似文献
6.
捕获再捕获与捕获移出模型的概念、方法和新进展 总被引:5,自引:0,他引:5
捕获再捕获与捕获移出研究是数理统计的一个重要方向,它研究如何利用随机样本估计有限群体的总体数目。本文对捕获再捕获与捕获移出模型的历史、基本统计思想、方法及近年来的新进展作一个简要而又较系统的回顾。 相似文献
7.
WANG Shan & LI ZhiPing LMAM School of Mathematical Sciences Peking University Beijing China 《中国科学 数学(英文版)》2011,(5)
An annular sector model for the telephone cord buckles of elastic thin films on rigid substrates is established, in which the von Krman plate equations in polar coordinates are used for the elastic thin film and a discrete version of the Griffith criterion is applied to determine the shape and scale of the parameters. A numerical algorithm combining the Newmark-β scheme and the Chebyshev collocation method is designed to numerically solve the problem in a quasi-dynamic process. Numerical results are presen... 相似文献
8.
LI YingQiu HU YangLi & LIU QuanSheng College of Mathematics Computing Sciences Changsha University of Science Technology Changsha China College of Mathematics Computer Sciences Hunan Normal University Changsha LMAM University of Bretgne-Sud BP Vannes France 《中国科学 数学(英文版)》2011,(7)
Let W be the limit of the normalized population size of a supercritical branching process in a varying or random environment. By an elementary method, we find sufficient conditions under which W has finite weighted moments of the form EWpl(W), where p > 1, l 0 is a concave or slowly varying function. 相似文献
9.
We are concerned with the existence of quasi-periodic solutions for the follow- ing equation x″ F_x(x,t)x′ ω~2x φ(x,t)=0, where F and φare smooth functions and 2π-periodic in t,ω>0 is a constant.Under some assumptions on the parities of F and φ,we show that the Dancer's function,which is used to study the existence of periodic solutions,also plays a role for the existence of quasi-periodic solutions and the Lagrangian stability (i.e.all solutions are bounded). 相似文献
10.
LI Zhong LMAM & School of Mathematical Sciences Peking University Beijing China 《中国科学A辑(英文版)》2005,(8)
Let T(S) be the Teichmuller space of a Riemann surface S. By definition, a geodesic disc in T(S) is the image of an isometric embedding of the Poincare disc into T(S). It is shown in this paper that for any non-Strebel point τ∈T(S), there are infinitely many aeodesic discs containina [0] and τ. 相似文献